You mean the people who studied engineering from best colleges and work in research and develop new technologies?? I can tell you you can not find a single person who can say that he understand QElec 100%. Most smart people are at the most uncertain about whole thing and trying to
improve
on it.

I am talking about the people who work on that theory for a living -- the people who created it, and the people who spent decades looking for any way to correct or alter it.

Quite a few of the smartest people in the world, people who really do understand the theory in complete detail, have worked for years to try to find anything to add to it, because if they could, it would make their professional reputation and they'd be stars. They only ended up verifying the theory.